Alarm clock electric switch



Sept 4, 19349 E. STALLWORTH 11,972,634

ALARM CLOCK ELECTRIC SWITCH Filed Sept. 28, 1953 eral public at a Patented Sept. 4, 1934 UNITED STATES PATENT; OFFICE 1,972,634 ALARM CLOCK ELECTRIC SWITCH Elbert Stallworth, Americas, Ga. Application September 28, 1933, Serial No. 691,367 3 Claims. (Cl; 200-35) The invention relates to improvements in alarm clock electric switches by means of an attachment suitable to be adjusted to the winding stems of alarm clocks in such a manner to open or close an electric circuit by engaging an upwardly projecting arm attached to my switch which is conveniently mounted to the inner circumferential surface of a metal band which may be adjusted around the rear portion of cylindrical alarm clocks of various sizes; and the objects of the improvement are, first, to provide an alarm clock electric switch which may be conveniently used with most alarm clocks now on the market; and second, to provide an alarm clock electric switch which may be manufactured and sold to the genvery low cost.

Suitable plug connections may be made between my alarm clock -electric switch and any convenient lighting or wall sockets for supplying electric current, but since this is an obvious expedient, this feature will not further be referred to.

Figure 1 is an end view of my alarm clock electric switch as it appears mounted to the inner surface of the metal band, and the manner in which the metal band appears attached around the rear portion of an alarm clock, when the position of the switch is proper to open an electric circuit to which it may be applied.

Figure 2 is a side view of'the metal band inclosing my alarm clock electric switch showing the manner in which it is constructed with overlapping ends to be adjustable to cylindrical alarm clocks of various sizes. Line, ofi indicates the position of the metal band around the rear portion of an alarm clock when'the switch is set to open an electric circuit Line, on indicates the position of the metal band around the rear portion of an alarm clock when the alarm clock electric switch is set to close an electric circuit to which it may be applied.

Figure 3 is a similar view to Figure 1, showing a reverse position of my alarm clock electric switch as it appears mounted to the inner surface of the metal band, and the reverse manner in which the metal band appears attached around the rear portion of an alarm clock, when the switch is in proper circuit to which it may be applied.

Figure 4 is a partly side view of the alarm clock electric vswitch showing the manner of its construction, and the relationship of its different parts to each other.

Like characters of reference designate similar overlapping ends when the clock alarms.

position to "close an electric parts throughout the different figures of the drawing. I I r The following is andetail description of my invention: A metal band is provided for the purpose of furnishing-mountable means by which my alarm clock electric switch may be conveniently attached to the rear portion of alarm clocks. In Figure 2, a side view of the metal band is shown illustrating the manner of construction and how it appears attached around the rear portion of an alarm clock in combination with my switch. The metal band is constructed with being held together in a manner to'be adjustable to alarm clocks of different sizes. The circumference of the metal band may be increased or decreased by two bolts 9 extending through a pair of holes near one end of the metal band with suitable adjustment to engage two rows of holes 8 near its opposite end. A thumb screw 4 extends from the outer surface of the metal band inwardly for the purpose of holdin arclamping manner against the alarm clock to which my alarm clock electric switch may be applied. A plug cap receptacle 1 comprising two insulated members are held together by a central bolt 2 in such a manner to clamp firmly a pair of U-shaped terminal sockets 17. These terminal sockets are provided with horizontally bent ends" forming shoulders that they maybe conveniently held 8 between the two insulated members of the plug cap receptacle, while the other portion of each socket in the form of a 'U, extends inwardly through an aperture in a central portion of the metal band to which the plug cap receptacle is attached by two bolts 7. A flat metal spring 13 is attached to the inner surface of the metal band by two bolts 6 which extend inwardly from the outer surface of the metal band. The metal spring 13 is provided with a projecting arm 12 which is bolted to the fiat metal spring near its center. The upper end of the projecting arm 12 is bent in a manner. to form a triangleto provide a suitable surface for contacting a crossarm'member 23. An insulated member 15 is provided with a bow-shaped contact member L6, and is fastened by a bolt 14 to the upper end of the flat metal spring 13. A set screw 3 extends inwardly from the outer surface of the metal band in a manner to press against the under surface of the flat metal spring 13 for the purpose of regulating the distance between contact member 16 and the U-shaped terminal sockets 1'7 in making suitable adjustment for contact member 16 to be forced to or away from terminal sockets llf 2 1'7 by cross-arm member 23 which presses against projecting arm 12 during the pivotal movement of the alarm clock winding stem 26 in opening or closing an electric circuit to which my alarm clock electric switch may be applied in combination with an alarm clock. A winding stem clamp 29 is attached to a winding stem 26. The winding stem clamp consists of a slotted base suitable to receive alarm clock winding stems of various sizes. A stationary jaw 18 is attached to the top surface of the slotted base by means of two leg-like supports in a manner suitable to be fastened to a detachable jaw 19 in forming a clamp to hold a upright position. A bolt 20 and two bolts 21 hold firmly the vertical metal strip 24 against the stationary jaw 18. Vertical metal strip 24 supports the cross-arm member 23 by a bolt which may be adjusted when desired, to extend through any one of the holes near the upper end of the metal strip 24: in a manner to allow said cross-arm member 23 to be moved upward, downward, backward or forward on the metal strip 24, when such adjustment is necessary to permit cross=arm member 23 and projecting arm 12 to be a suitable distance to contact each other when my alarm clock electric switch is used in combination with alarm clocks of different sizes. Two fan-shaped shields 10 provide means by which the mechanism of my electric switch inclosed by the metal band may be protected from view. The fan-shaped shields are provided, each, with three brackets 11 that the fan-shaped shields 10 maybe conveniently attached to the inner surface of the metal band by three bolts 5.

Further details of my alarm clock electric switch, indicating plainly the method of its use, are as follows: In Figure 1, line 25 indicates the position of arm 23 when the alarm clock electric switch, attached to the rear portionof an alarm clock, is in proper position to open an electric circuit. When the switch is set to open an electric circuit during the alarming of a clock to which it may be attached, set screw 3 pressing against the under surface of the fiat metal spring 13 is screwed outwardly in .the metal band to the extent of allowing contact member 16 to rest on terminal sockets 1'7, in this position, the switch performs its duty by means of the closed electric circuit until the clock to which it has been attached alarms, and causing a pivotal movement of winding stem 26 which moves cross-arm 23 against projecting arm 12 in a manner to force contact member 16 away from terminal sockets 1'7 to perfect an open electric circuit.

In Figure 3, line 25 indicates the position of cross-arm 23 suitable to engage projecting arm 12 on a reverse side to that shown in Figure 1. In this position, the switch is set to close an electric circuit during the alarming of a clock to which it may be attached. When the switch is set to'close an electric circuit, set screw 3 suitable to engage the under surface of the metal spring 13 is screwed inwardly through the metal band against the under surface of the flat metal spring 13 to the extent of slightly raising contact member 16 from terminal sockets 1'7, in this position, the switch performsits duty by means of this open electric circuit adjustment until the clock to which it has been attached alarms, causing a pivotal movement of winding stem 26 which moves cross-arm 23 against projecting arm 12 in\ a manner to force contact member 16 attached to the metal spring 13 against terminal sockets 1'7 toperfect a closed electric circuit.

vertical metal strip 24 in an The two positions of the alarm clock electric switch as it appears attached to the rear portion of an alarm clock referred to in Figures 1 and 3 are illustrated in Figure 2 by the off and on notations on both the surface of the alarm clock and metal band. Line 2'7 indicates the proper position of the metal band around the rear portion of an alarm clock when its edge 28 embraces said line 27, and the oil or on notations of the metal band are placed in the exact alignment with the off and on notations indicated on the body of the alarm clock. When the duty of the switch is to open an electric circuit at a time when the clock alarms, off on the metal band is in exact alignment with ofi of the body of the clock. When the duty of the alarm clockelectric switch is to close an electric circuit during thealarming of the clock to which it has been attached, the on notation of the metal band is in exact alignment with the on notation on the body of the clock.

I claim:

1. An alarm clock electric switch, the combination with a metal band consisting of overlapping ends which provide means of increasing or decreasing the circumference of said metal band,

two bolts engaging a pair of holes near one end i of said metal band in a manner to engage two rows of holes near the opposite end thereof, a thumb screw extending inwardly from the outer surface of said metal band in a manner to clamp said metal band against the body of any alarm clock to which said alarm clock electric switch may be applied.

2. An alarm clock electric switch, the combination with a metal band comprising overlapping ends held together in a manner to increase or decrease the circumference of said metal band by means of two bolts engaging a pair of holes at one end of said metal band suitable to reciprocate with two rows of holes near the opposite end thereof, a thumb screw extending inwardly from the outer surface of said metal band to hold said metal band in a clamping manner against the body of any alarm clock to which said alarm clock electric switch may be applied, a plug cap receptacle comprising two insulated members, a central bolt to hold said two insulated members together in a manner to clamp firmly a pair of terminal sockets with horizontally bent ends, said pair of terminal sockets being clamped between said insulated members in a manner suitable to extend inwardly in a U-shaped form through an aperture in a central portion of said metal band, a pairof bolts extending inwardly through said metal band to hold said plug cap receptacle to the outer surface of said metal band over said aperture.

3. An alarm clock electric switch of the chapacter described, a metal band consisting of over-1 attached, a thumb screw extending through the outer surface of said metal band in an inward manner to hold said metal band firmly against said alarm clock, a plug cap receptacle consisting of two insulated members held together by a cen- I tral bolt, a pair of U-shaped terminal sockets having horizontally bent ends clamped firmly between said insulated members in a manner to ex- 15a tend inwardly through an aperture in a central portion of said metal band, tending inwardly through the outer surface of said metal band to hold said plug cap receptacle t0 the outer surface thereof, a fiat metal spring being held to the inner surface of said metal band by two bolts extending inwardly from the outer surface thereof, a projecting arm with a triangular upper end attached in a central portion of said metal spring, an insulated member provided with a bow-shaped contact member bolted near the upper end of said flat metal spring, a set screw extending inwardly from the outer surface of said metal band suitable to press against manner to regulate the distance between said bow-shaped insulated member and said terminal by which said fan-shaped shields held to the inner surface of said three bolts extending from the thereof.

may be suitably metal band by outer surface ELBERT STALL WORTH. 

